The number of radial node/s for 3p orbital is:

It the radius of the 3rd Bohr’s orbit of hydrogen atom is r3 and the radius of 4th Bohr’s orbit is r4. Then :

The pair, in which ions are isoelectronic with $\mathrm{Al}^{3+}$ is :-

Consider the following pairs of electrons (A) (a) $\mathrm{n}=3, \ell=1, \mathrm{~m}_1=1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ (b) $\mathrm{n}=3, \ell=2, \mathrm{~m}_1=1, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$ (B) (a) $\mathrm{n}=3, \ell=2, \mathrm{~m}_1=-2, \mathrm{~m}_{\mathrm{s}}=-\frac{1}{2}$ (b) $...

Number of spectral lines obtained in $\mathrm{He}^{+}$spectra, when an electron makes transition from fifth excited state to first excited state will be

Match List I with List II

Choose the correct answer from the options given below...

The energy of an electron in first Bohr orbit of H -atom is -13.6 eV. The magnitude of energy value of electron in the first...

Consider the ground state of chromium atom $(Z=24)$ . How many electrons are with Azimuthal quantum number $l=1$ and $l=2$ respectively ?

The extra stability of half-filled subshell is due to : (A) Symmetrical distribution of electrons (B) Smaller coulombic repulsion energy (C) The presence of electrons...